You will need to find out how to do this in the manual that came with your modem many manuals are available online.Įven if it is a hassle trying to work out how to access your modem statistics, directly determining your connection speed from your modem allows you to avoid the inaccuracies of online speeds tests as a result of: In many cases, you can access the connection speeds from one of your modem’s menus. Table: Downlink connection speed, IP Profile and actual throughput for fibre broadbandĭetermine your connection speed from your modemĬonnection speeds are the downlink and uplink rates at which your modem connects (synchronises) to the BT exchange, and are set by equipment in the exchange. IP Profile is 96.69% of the connection speed for lines enabled with G.INP So, online speed tests that report your download speed to be about 75 Mbps are indicating that you are actually achieving the fastest speed possible (equating to a connection speed of 80 Mbps). However, your throughput will peak at about 75 Mbps. As shown in the table below for VDSL fibre broadband, the real throughput (for example, measured by an online speed test) will be significantly lower than the connection speed.Īs an example, if you are able to get the maximum speed possible from a fibre broadband connection (for example, you are located very close to the fibre street cabinet), your download connection speed will max out at 80 Mbps. Secondly, IP packets don’t only contain useful ‘payload’ information and also contain headers about the information sent.
This is because there is an overhead in getting the IP packets from the ISP to your modem, which is reflected in the so-called “IP Profile”. The actual throughput of your connection (which is the real speed for the applications that you use) will be lower than the connection speed. The connection speed is the speed at which your router communicates with the DSLAM equipment in the exchange or fibre broadband cabinet. For example, when broadband providers generally talk about broadband speeds (for example, up to 80 Mbps with fibre broadband) they are referring to the connection speed (synch speed). Please bear in mind that speed tests generally report what is known as the throughput of the connection, which is different to (and significantly lower than) the connection speed (otherwise known as the ‘synch speed’).
Poor WiFi coverage or interference can often cause rapid fluctuations in speed test results. Try to avoid running an online speed test if connected to your router by WiFi (or a powerline adapter). Directly connect your device to your router by Ethernet cable if possible.Generally, the highest results will be the most accurate. Try to run speed tests at different times of the day, and on different days, and note the best results. Particularly at peak times, the servers used to provide online speed tests could be overloaded. Any of these could be using your broadband connection at the same time. Many people now have a number of devices connected to their broadband connection, including set-top boxes, games consoles, laptops, tablets and mobile phones. Ensure that no other devices on your network are using the broadband connection (for example, a mobile phone, tablet or set-top box in another room).Close any programs that may be running on your device, including anti-virus software, peer-to-peer clients, online storage applications and automatic updates. Another program running on your device at the same time (for example, a software download) could be using your Internet connection while you are trying to run a speed test. Ensure that there are no other programs or applications running in the background.Before you run your online speed test, please: Below is our online speed test, provided by Ookla.Īs described in our article Online Speed Tests: how to use them and which are the best, be careful when using online speed tests to judge the speed of your broadband connection. Online speed tests are typically the easiest way to estimate the speed of your broadband connection, but beware inaccurate results.
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